A fact from 1971 Salem, Illinois, derailment appeared on Wikipedia's Main Page in the Did you know column on 12 October 2014 (check views). The text of the entry was as follows:
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I found my source from the Illinois Central diesel locomotive roster. It said 4031 was the last of EMD order number 2042, an order of E7A’s by the IC, ranging from 4026-4031. 4031’s serial number is 2042-A6. Nick Gurr 7777| TALK / CONTRIBS |14:21, 1 October 2019 (UTC)[reply]